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Accumulated Other Comprehensive Income (loss) - Reclassifications from Accumulated Other Comprehensive Income (Loss) to Income Statement (Detail) (USD $) In Millions, unless otherwise specified | Mar. 31, 2013 | Mar. 31, 2012
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Amortization of defined benefit pension: |  |
Accumulated other comprehensive income, defined benefit pension net of tax | $ 5 | $ 4
Selling, General & Administrative Expense [Member] |  |
Amortization of defined benefit pension: |  |
Accumulated other comprehensive income, defined benefit pension, before tax | 5 | 4
Tax expense [Member] |  |
Amortization of defined benefit pension: |  |
Accumulated other comprehensive income, defined benefit pension, tax |  |
Interest expense [Member] |  |
Amortization of defined benefit pension: |  |
Interest rate swaps |  |

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- Definition Unrealized Loss On Interest Rate Swaps + References No definition available. + Details
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- Definition The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph i -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 10A -Subparagraph (i-k) -URI http://asc.fasb.org/extlink&oid=20435746&loc=SL7669646-108580 + Details
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- Details
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- Definition After tax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s). + References No definition available. + Details
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